--- libc/sysdeps/unix/sysv/linux/sys/sysctl.h.orig	2004-04-29 22:09:24.000000000 +0200
+++ libc/sysdeps/unix/sysv/linux/sys/sysctl.h	2004-05-05 23:23:49.009395912 +0200
@@ -22,6 +22,9 @@
 #include <features.h>
 #define __need_size_t
 #include <stddef.h>
+#include <linux/version.h>
+
+#ifndef LIBC_HEADERS_VERSION
 /* Prevent more kernel headers than necessary to be included.  */
 #ifndef _LINUX_KERNEL_H
 # define _LINUX_KERNEL_H	1
@@ -40,6 +43,7 @@
 # define __user
 # define __undef__LINUX_COMPILER_H
 #endif
+#endif
 
 #include <linux/sysctl.h>